void RenderAmbientLight()
{
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFunc(GL_ONE, GL_ONE);
m_LightingTech.Enable();
m_pointLight.AmbientIntensity = 0.2f;
m_pointLight.DiffuseIntensity = 0.0f;
m_LightingTech.SetPointLights(1, &m_pointLight);
Pipeline p;
p.SetPerspectiveProj(m_persProjInfo);
p.SetCamera(m_pGameCamera->GetPos(), m_pGameCamera->GetTarget(), m_pGameCamera->GetUp());
m_boxOrientation.m_rotation = Vector3f(0, m_scale, 0);
p.Orient(m_boxOrientation);
m_LightingTech.SetWVP(p.GetWVPTrans());
m_LightingTech.SetWorldMatrix(p.GetWorldTrans());
m_box.Render();
p.Orient(m_quadOrientation);
m_LightingTech.SetWVP(p.GetWVPTrans());
m_LightingTech.SetWorldMatrix(p.GetWorldTrans());
m_pGroundTex->Bind(COLOR_TEXTURE_UNIT);
m_quad.Render();
glDisable(GL_BLEND);
}
void RenderShadowedScene()
{
glDrawBuffer(GL_BACK);
// Draw only if the corresponding stencil value is zero
glStencilFunc(GL_EQUAL, 0x0, 0xFF);
// prevent update to the stencil buffer
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
m_LightingTech.Enable();
m_pointLight.AmbientIntensity = 0.0f;
m_pointLight.DiffuseIntensity = 0.8f;
m_LightingTech.SetPointLights(1, &m_pointLight);
Pipeline p;
p.SetPerspectiveProj(m_persProjInfo);
p.SetCamera(m_pGameCamera->GetPos(), m_pGameCamera->GetTarget(), m_pGameCamera->GetUp());
m_boxOrientation.m_rotation = Vector3f(0, m_scale, 0);
p.Orient(m_boxOrientation);
m_LightingTech.SetWVP(p.GetWVPTrans());
m_LightingTech.SetWorldMatrix(p.GetWorldTrans());
m_box.Render();
p.Orient(m_quadOrientation);
m_LightingTech.SetWVP(p.GetWVPTrans());
m_LightingTech.SetWorldMatrix(p.GetWorldTrans());
m_pGroundTex->Bind(COLOR_TEXTURE_UNIT);
m_quad.Render();
}
void ShadowMapPass()
{
glCullFace(GL_FRONT);
m_shadowMapEffect.Enable();
PersProjInfo ProjInfo;
ProjInfo.FOV = 90.0f;
ProjInfo.Height = WINDOW_HEIGHT;
ProjInfo.Width = WINDOW_WIDTH;
ProjInfo.zNear = 1.0f;
ProjInfo.zFar = 100.0f;
Pipeline p;
p.SetPerspectiveProj(m_persProjInfo);
glClearColor(FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX);
for (uint i = 0 ; i < NUM_OF_LAYERS ; i++) {
m_shadowMapFBO.BindForWriting(gCameraDirections[i].CubemapFace);
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
p.SetCamera(m_pointLight.Position, gCameraDirections[i].Target, gCameraDirections[i].Up);
p.Orient(m_mesh1Orientation);
m_shadowMapEffect.SetWorld(p.GetWorldTrans());
m_shadowMapEffect.SetWVP(p.GetWVPTrans());
m_mesh.Render();
p.Orient(m_mesh2Orientation);
m_shadowMapEffect.SetWorld(p.GetWorldTrans());
m_shadowMapEffect.SetWVP(p.GetWVPTrans());
m_mesh.Render();
}
}
void RenderShadowVolIntoStencil()
{
glDepthMask(GL_FALSE);
glEnable(GL_DEPTH_CLAMP);
glDisable(GL_CULL_FACE);
// We need the stencil test to be enabled but we want it
// to succeed always. Only the depth test matters.
glStencilFunc(GL_ALWAYS, 0, 0xff);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_INCR_WRAP, GL_KEEP);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_DECR_WRAP, GL_KEEP);
m_ShadowVolTech.Enable();
m_ShadowVolTech.SetLightPos(m_pointLight.Position);
// Render the occluder
Pipeline p;
p.SetCamera(m_pGameCamera->GetPos(), m_pGameCamera->GetTarget(), m_pGameCamera->GetUp());
p.SetPerspectiveProj(m_persProjInfo);
m_boxOrientation.m_rotation = Vector3f(0, m_scale, 0);
p.Orient(m_boxOrientation);
m_ShadowVolTech.SetWVP(p.GetWVPTrans());
m_box.Render();
// Restore local stuff
glDisable(GL_DEPTH_CLAMP);
glEnable(GL_CULL_FACE);
}
void RenderSceneIntoDepth()
{
glDrawBuffer(GL_NONE);
m_nullTech.Enable();
Pipeline p;
p.SetCamera(m_pGameCamera->GetPos(), m_pGameCamera->GetTarget(), m_pGameCamera->GetUp());
p.SetPerspectiveProj(m_persProjInfo);
m_boxOrientation.m_rotation = Vector3f(0, m_scale, 0);
p.Orient(m_boxOrientation);
m_nullTech.SetWVP(p.GetWVPTrans());
m_box.Render();
p.Orient(m_quadOrientation);
m_nullTech.SetWVP(p.GetWVPTrans());
m_quad.Render();
}
void RenderPass()
{
glCullFace(GL_BACK);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_lightingEffect.Enable();
m_shadowMapFBO.BindForReading(SHADOW_TEXTURE_UNIT);
m_lightingEffect.SetEyeWorldPos(m_pGameCamera->GetPos());
Pipeline p;
p.SetPerspectiveProj(m_persProjInfo);
p.SetCamera(*m_pGameCamera);
// Render the quads
m_pGroundTex->Bind(COLOR_TEXTURE_UNIT);
p.Orient(m_quad1Orientation);
m_lightingEffect.SetWorldMatrix(p.GetWorldTrans());
m_lightingEffect.SetWVP(p.GetWVPTrans());
m_quad.Render();
p.Orient(m_quad2Orientation);
m_lightingEffect.SetWorldMatrix(p.GetWorldTrans());
m_lightingEffect.SetWVP(p.GetWVPTrans());
m_quad.Render();
// Render the meshes
p.Orient(m_mesh1Orientation);
m_lightingEffect.SetWorldMatrix(p.GetWorldTrans());
m_lightingEffect.SetWVP(p.GetWVPTrans());
m_mesh.Render();
p.Orient(m_mesh2Orientation);
m_lightingEffect.SetWorldMatrix(p.GetWorldTrans());
m_lightingEffect.SetWVP(p.GetWVPTrans());
m_mesh.Render();
}
